mad */*/

UK [mæd] / US adjective
Word forms "mad":
adjective mad comparative madder superlative maddest

1) very silly or stupid

You'll think I'm mad – I've just left my job.

be mad to do something:

You're mad to spend so much money on clothes.

a) informal tending to behave in a strange way that other people sometimes consider funny

a mad scientist

b) informal an offensive way for describing someone who is mentally ill

She was completely mad.

•

Collocations:
Adverbs frequently used with mad
▪  completely, really, slightly, totally, utterly

2) [never before noun] informal angry

He makes me mad, the way he keeps criticizing me all the time.

mad at/with:

My boss is mad with me for missing the meeting.

3) done quickly or without thinking, in a way that is badly organized

There were people everywhere – it was all a bit mad!

a mad rush/dash:

It was a mad rush to get the job finished.

•

(as) mad as a hatter — often humorous extremely silly or strange, sometimes because of mental illness

mad about/on something — British

informal very enthusiastic about something

Fiona's mad on swimming.

mad keen (on) — British

informal extremely enthusiastic about something

The kids are mad keen on computer games at the moment.

mad with rage/grief/pain etc — unable to behave or think in a sensible or controlled way because of great anger, sadness, pain etc

Mad with grief, he started smashing plates on the floor.

someone must be mad (to do something) — mainly spoken used for saying that someone is doing something very stupid, or has done something very stupid

You must be mad to sell that beautiful house.

- drive someone mad

- go mad

- like mad

- mad about someone